2012년 2월 11일 토요일

Dic: at (trying to do something, particular condition or state)


17. v PREP n △You use at to show that someone is doing something repeatedly.
6. used after a verb △to show that someone tries to do something, or partly does something, but does not succeed or complete it.

  • She lowered the handkerchief which she had kept dabbing at her eyes...
  • Miss Melville took a cookie and nibbled at it.
  • He clutched wildly at the rope as he fell.
  • She nibbled at a sandwich (= ate only small bits of it).
14. v-link PREP n △You use at to say that someone or something is in a particular state or condition.
8. used to show △the situation someone or something is in, what someone is doing, or what is happening
  • I am afraid we are not at liberty to disclose that information...
  • Their countries had been at war for nearly six weeks.
  • The country is now at war.
  • I felt like I was at a disadvantage.
  • I think Mr. Harris is at lunch.
...... COBUILD, OALD

CF.
16 [PREP] △You use at to say how something is being done.
  • Three people were killed by shots fired at random from a minibus...
  • Mr Martin was taken out of his car at gunpoint.
19 [PREP] adj PREP n, n PREP n, v PREP n △You use at to indicate what someone is reacting to.
  • Eleanor was annoyed at having had to wait so long for him...
  • The British team did not disguise their delight at their success...
.... COBUILD

* * *

예문:
  • It is not possible to make profits by acting on old information or at patterns of past price changes.
 Let's try to catch different images between:
  • act on old information
  • act at patterns of past price changes

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